JPH0428876B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drilling device used for excavating pile holes and the like.

[Conventional technology]

A casing auger construction method is known in which a casing is placed outside the screw when excavating with an auger screw for pile construction.

As the excavation equipment used in this construction method, both the drive device for driving the screw and the drive device for driving the casing are connected to form an integral drive device as a drive device that runs vertically along a long leader mast.

[Problem to be solved by the invention]

With the drive device used in such conventional casing auger construction methods, when adding the auger screw and casing, the drive device is raised along the leader mast to provide enough space for the new addition member to enter vertically. There must be.

Therefore, work at heights is required, and the heavy drive device is located above, resulting in an unstable situation where the center of gravity is high.

In order to eliminate this drawback, it may be possible to separate the drive device for the screw and the drive device for the casing, and keep the drive device for the casing at a relatively low position even when adding screws and casings. The casing drive device is one that rotationally drives a chuck device that grips the outer periphery of the casing.

However, even with this kind of drive device, when adding an auger screw, the screw drive device must always be raised to a high place, which completely eliminates work at high places and unstable conditions. Not done.

The purpose of the present invention is to eliminate the disadvantages of the conventional example,
When adding casings and auger screws, this can be done without moving the drive mechanism upwards, and as a result, work at heights is not required, the tall leader mast can be omitted, and the whole can be made smaller and more compact. Our goal is to provide drilling equipment.

[Means to solve the problem]

In order to achieve the above-mentioned object, the present invention has the following features:
A swing pushing device is provided that engages the outer periphery of the casing that is set so as to penetrate this frame, and consists of a chuck device for the outer periphery of the screw blade of the auger screw, a drive motor that rotationally drives this, and its transmission mechanism. The gist of the present invention is that the driving device of the auger screw is supported by an elevating cylinder and provided on a pedestal so as to straddle the swinging pushing device.

[Effect]

According to the present invention, the casing is set so as to pass through the pedestal, and the outer peripheral portion is vibrated in the vertical direction by the swing pushing device, and is inserted into the ground.

Further, the auger screw, which is inserted from above within the casing, is rotated by applying rotational force to the outer periphery of the blade portion by the drive device via the chuck device.
At the same time, when the extended lifting cylinder is released, the drive device supported by this cylinder is lowered, and the chuck device also pushes down the entire auger screw. In this way, the auger screw is driven to rotate and excavates and discharges the earth and sand inside the casing. Further, since the upper end of the auger screw protrudes above the drive device, additional screws can be added without moving the drive device.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a partially cutaway front view of the excavation apparatus of the present invention, in which reference numeral 1 is a pedestal having an outrigger 2 on the outer circumferential side, and a through hole 3 formed in the center.

Vertical cylinders 4 are erected on both sides of the through hole 3 on the pedestal 1 to support a chuck device 5 on the outer periphery of the casing 8, and a short leader mast 6 is erected on the pedestal 1. The lower part of the leader mast 6 and the chucker device 5 are connected by a swing cylinder 7. These vertically movable cylinder 4, chuck device 5, and swinging cylinder 7 constitute a swinging pushing device 9 that engages with the outer peripheral portion of the casing 8.

Further, lifting cylinders 10 were erected on both sides of the swinging pushing device 9 on the frame 1, and the driving device 12 of the auger screw 11 was supported by the lifting cylinders 10 so as to straddle the swinging pushing device 9. .

The drive device 12 of the auger screw 11 includes a drive motor 13 and a transmission mechanism 14 connected to the drive motor 13.
It consists of a reduction gear and a chuck device 15 that rotates via this gear.

The chuck device 15 has a pressing plate 17, which is formed by vertically dividing a cylindrical body smaller in diameter than the cylindrical body 16, arranged inside a rotary cylindrical body 16 having the gear on its outer periphery. The cylindrical body 16 is provided so as to protrude from the inside to the outside, and the outer end of the arm 18 is tapered, and this tapered surface is brought into sliding contact with the inner tapered surface of the ring body 19. Furthermore, the ring body 19 is supported by an elevating cylinder 10, and a chuck cylinder 2 is installed upright on a pedestal 20 having a through hole 21 in the center.
2 supports it so that it can move up and down.

Further, this pedestal 20 is engaged with the leader 6a of the leader mast 6 on the pedestal 1 so as to be movable up and down.

In the figure, reference numeral 23 denotes a swivel connected to the upper end of the auger screw 11 for feeding cement milk or the like into the auger screw 11 and causing it to protrude from the tip.

Next, usage and operation will be explained.

The casing 8 is set on the pedestal 1 so as to pass through the through hole 3, and its outer periphery is gripped by the chuck device 5.

This chuck device 5 is then operated by the swing cylinder 7.
By contracting the vertical cylinder 4 while applying vibration to the casing 8 through the casing 8, the casing 8 is inserted into the ground.

At the same time, the auger screw 11 is placed inside the casing 8.
When the ring body 19 is inserted and extended with the chuck cylinder 22, the ring body 19 rises and the arms 18 move closer to each other due to the wedge effect, so that the pressing plate 17 is pressed against the outer periphery of the screw blade 11a of the auger screw 11. The auger screw 11 is held by a chuck device 15. And drive motor 1
The rotation torque of No. 3 is transmitted to the rotary cylinder body 16 via the transmission mechanism 14, and the arm 18 and the press plate 17 rotate together with the rotary cylinder body 16, so that the auger screw 11 also rotates.

Furthermore, when the elevating cylinder 10 is released from the extended state, the entire drive device 12 descends along the leader 6a of the leader mast 6, and the auger screw 11 is also pushed down via the chuck device 15, causing rotational drive. The auger screw 11 excavates the earth and sand inside the casing 8.

In this way, when the auger screw 11 is pushed in by the stroke of the lifting cylinder 10, the chuck cylinder 22 is retracted and the cylinder body 19 is pushed in.
By lowering the chuck device 15, the drive device 12 is raised again by the cylinder 10, and the upper screw blade 11a is gripped again, and the same operation is repeated, and as a result, the auger screw 11 is successively fed.

Once the auger screw 11 of the required length has been inserted, it is added to the auger screw 11. In this case, the upper end of the auger screw 11 protrudes above the drive device 12, so the upper end of the auger screw 11 will be added to the drive unit 12. It can be set by hanging it up.

〔Effect of the invention〕

In the excavating device of the present invention as described above, the rotational drive of the auger screw is performed via a chuck device to the outer periphery of the screw blade, so that the screw can be added without a driving device.
It is possible to work in stable conditions.

Furthermore, since there is no need to move the drive device up and down significantly, a long leader mast is not required, and since the casing is inserted by a swinging device, this device can be housed under the drive device. As a result, the entire device is compact and can be mounted on a frame, making it highly versatile and usable even in narrow spaces.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view showing one embodiment of the excavation equipment of the present invention, Fig. 2 is a side view of the same, Fig. 3 is a plan view of a casing swinging device, and Fig. 4 is an auger crevice. A vertical side view of the drive device of the U, FIG. 5 is a view taken along the line A-A in FIG. 4, and FIG.
- It is a B line arrow view. DESCRIPTION OF SYMBOLS 1... Frame, 2... Outrigger, 3... Through hole, 4... Vertical movement cylinder, 5... Chuck device, 6... Leader mast, 6a... Leader, 7
...Swinging cylinder, 8...Casing, 9...Swinging pushing device, 10... Lifting cylinder, 11...
Augus Screw, 11a...screw feather,
12... Drive device, 13... Drive motor, 14
...Transmission mechanism, 15...Chuck device, 16...
... Rotating cylinder body, 17 ... Pressing plate, 18 ... Arm,
19...Ring body, 20...Base, 21...Through hole, 22...Chuck cylinder, 23...Swivel.

Claims (1)

[Claims] 1. A swing pushing device is provided on the pedestal frame to engage with the outer periphery of the casing that is set so as to pass through the pedestal, and a chuck device to the outer periphery of the screw blade of the auger screw, a drive motor for rotationally driving the same, and An excavation device characterized in that an auger screw driving device comprising the transmission mechanism is supported by an elevating cylinder and installed on a pedestal so as to straddle the swinging pushing device.